--- title: "The Best Diesel Oils: Keep Your Vehicle’s Engine in Peak Condition" description: "Looking for diesel oil? Our team of experts narrowed down the best diesel oils on the market. Read this review and save yourself time and money." date: "2021-06-22" modified: "2023-05-18" authors: - name: "Corrina Murdoch" link: "https://www.thedrive.com/authors/corrina-murdoch" url: "https://www.thedrive.com/reviews/28491/best-diesel-oils" categories: - "Car Parts" - "Engine & Motors" - "Gas & Oil" - "The Garage" tags: - "Buying Guides" - "commerce" - "NoAds" - "Roundup" --- # The Best Diesel Oils: Keep Your Vehicle’s Engine in Peak Condition ![Changing Diesel Oil]() Engine performance is essential to your vehicle's overall function, and it needs proper care and nourishment to do its job. By choosing the best oil for your car or truck, you're taking proactive steps to improve its performance and assist in overall reliability. Not to be confused with standard conventional and synthetic [engine oil](), diesel engine oil features a higher parts-per-million measurement of additives to help prevent sludge buildup. Because of this, it's important to select the right diesel-specific oil that'll give your vehicle's heart a long, healthy life. Of course, not all diesel oil is alike. In the century-and-a-half since its invention, countless manufacturers across the globe have come up with some outstanding black-gold innovations. The key to success is finding the best diesel oil for your truck and the road conditions you'll most likely face. We've broken down the best diesel oils available on the market today—check 'em out! ## Summary List of the Best Diesel Oils - Best Overall: [Royal Purple 15W40]() - Best Value: [Shell Rotella T6 Full Synthetic Multi-Vehicle 5W-30 Diesel Engine Oil]() - Honorable Mention: [Mobil 1 Turbo Diesel Truck Full Synthetic Motor Oil 5W-40]() - Honorable Mention: [Liqui Moly Diesel High Tech Synthetic 5W-40 Motor Oil]() - Honorable Mention: [Motul 8100 X-Clean+ 5W30 100% Synthetic Engine Oil]() - Honorable Mention: [Valvoline Premium Blue SAE 15W-40 Diesel Engine Oil]() - Honorable Mention: [Delo 400 SDE SAE 15W-40 Motor Oil]() ## Our Methodology We can’t put our own hands on every item available. In these instances, we put our collective experience in journalism, research, and prior product testing to use to make our product picks. Items that are used by our own staff may get earnest endorsements as well, but we’ll never accept fees or bonuses to sell you stuff we’re not actually excited about. Affiliate revenue is always disclosed. *The Drive* aggregates reviews and research from all over the internet to figure out which products are worth buying. We also put out shopping guides to help you understand how to assess the value of these things on your own. As we always say, “Knowledge is horsepower!” ## Best Diesel Oils: Reviews & Recommendations ## Our Verdict on the Best Diesel Oils Your ride deserves the best diesel oil to help it function better and last longer. The [Royal Purple 15W-40 Oil]() is a worthy pick overall, improving fuel efficiency and preventing corrosion. Looking for a more budget-friendly choice? The [Shell Rotella T6 Synthetic Diesel Motor Oil 5W-40 CJ-4]() is an excellent way to preserve the health of your engine and your wallet. ## FAQs You've got questions. The Drive has answers. ### Author social links